52 NATURAL HISTOEY BULLETIN 



their bases. It is more evident in others, but it is thin and 

 delicate. 



The oral plates are large and have a broadly and evenly 

 rounded margin, that of the pair combined forming a semi- 

 circle, and bearing along the edge a very regular compact row 

 of eighteen slender subequal spines, nine to each plate. Epioral 

 spines are also numerous and slender. 



Ambulacral sucker-feet and their pores are very large, reg- 

 ularly biserial. 



The type described by Perrier was smaller, radii 4™"^ and 10°^. 



Perrier, in his report on the starfishes of the Blake Expedition 

 (1884, pp. 167, 212, and 275), placed this species in three dis- 

 tinct genera, and under two different specific names (without ex- 

 planations or cross references) , as shown in the synonymy given 

 above. His description was given under Korethraster hispidits, 

 sp. nov."; but it was a reprint of his earlier description (1881), 

 which was given under Korethraster radians. 



The name, Lophaster radians, occurs in his lists of species 

 dredged ; and Solaster radians occurs only in the explanation of 

 plate vi. There is no reference to these figures in connection 

 with the description. I am not aware that he corrected these 

 references in any other later works. 



The type of this species, described by Perrier, was quite young 

 (radii and 10™"^), only about one-fourth as large as the one 

 now described. This will account for various differences. 



Perrier recorded this species from off Barbados, in 56 fathoms, 

 and off Havana, in 80 fathoms. It was also dredged at several 

 stations in the West Indies, by the Albatross." 



It was taken by the Bahama Expedition at several stations. 

 The largest, described above, was from station 64, in 110 fath- 

 oms, off Florida. Smaller ones occurred at sta. 28, off Sand 

 Key, in 116 fathoms; and at sta. 56, Pourtales Plateau, in 200 

 fathoms. Another (radii 10°^"^ and 33°^°^) was from station 62, 

 off Florida, in 80 fathoms. 



Genus Solaster Forbes. 



Solaster (pars) Forbes, Mem. Wern. Soc, viii, p. 120, 1839; British Star- 

 fishes, p. 109, 1841. Gray, Ann. and Mag. Nat. Hist, vi, p. 183, No- 

 vember, 1840; Synopsis, p. 4, 1866. Verrill, Proe. Boston Soc. Nat. 



